CN108081983B - Control system and control method for preventing storage battery from being lack of power - Google Patents
Control system and control method for preventing storage battery from being lack of power Download PDFInfo
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- CN108081983B CN108081983B CN201711276028.8A CN201711276028A CN108081983B CN 108081983 B CN108081983 B CN 108081983B CN 201711276028 A CN201711276028 A CN 201711276028A CN 108081983 B CN108081983 B CN 108081983B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0069—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to the isolation, e.g. ground fault or leak current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The invention provides a control system and a control method for preventing a storage battery from being lack of power, wherein the control system comprises an electric automobile and a mobile terminal; the electric automobile is integrated with a vehicle controller, a battery management system, a direct current-direct current converter, a storage battery, an intelligent storage battery sensor and a vehicle-mounted T-BOX; the vehicle control unit is in communication connection with a battery management system and a vehicle-mounted T-BOX, the battery management system is in communication connection with a direct current-direct current converter and an intelligent storage battery sensor, and the vehicle-mounted T-BOX is in communication connection with a mobile terminal through a wireless network; the invention can monitor the residual electric quantity of the storage battery of the electric automobile and the quiescent current of the whole automobile in real time so as to calculate the allowable standing time of the automobile; when the electric quantity of the storage battery is not saturated, the vehicle control unit can automatically time, automatically charge the storage battery according to the allowable static time of the vehicle, and a user can manually control the storage battery to charge through the mobile terminal according to the requirement.
Description
Technical Field
The invention relates to the field of storage batteries of electric automobiles, in particular to a control system and a control method for preventing the storage batteries from being insufficient.
Background
With a new technological revolution and continuous deepening of industrial revolution, the intellectualization and networking of the electric automobile become a strategic new direction of industrial development. At present, a high-voltage battery and a low-voltage battery are integrated on an electric automobile, wherein the high-voltage battery is mainly used for driving the electric automobile to run and charging the battery under the control of a vehicle controller; the low-voltage storage battery mainly provides electric energy for controlling the operation of functional modules of the electric automobile, and the static electricity consumption of the whole automobile is more and more along with the continuous increase of the functions of the electric automobile; the problem of insufficient battery power is increasingly highlighted.
At present, the technologies for preventing the power shortage of the storage battery mainly comprise the following two technologies:
firstly, the method comprises the following steps: a mechanical structure formula; through increase a manual switch on the battery discharge circuit, when the user does not use the vehicle for a long time, this switch is opened manually, cuts off the discharge circuit of battery, guarantees that the battery can not lack of electricity.
However, the technical scheme is realized by a mechanical structure, needs manual operation and is not intelligent enough; and after the discharging loop is cut off, all controllers of the whole vehicle are powered off, the vehicle state cannot be monitored, if accidents such as vehicle theft and collision occur, an alarm cannot be given, and potential safety hazards exist.
Secondly, the method comprises the following steps: charging at fixed time; the controller is arranged on the vehicle for standing timing, and when the standing time reaches a set fixed time, the controller wakes up relevant parts of the vehicle to charge the storage battery.
However, the technical scheme can only charge the storage battery at fixed intervals, and the following disadvantages may occur: (1) the storage battery is seriously lack of electricity within the standing time, and the timing charging cannot be started or can be started but the service life of the storage battery is damaged; (2) when the timing charging is started, the electric quantity of the storage battery is sufficient, the electric quantity does not need to be supplemented, and the electric quantity is wasted due to the charging at the moment.
Disclosure of Invention
The invention aims to provide a control system and a control method for preventing the power shortage of a storage battery, which can solve the problems of insufficient intelligence caused by the power shortage of the storage battery and potential safety hazards of a vehicle caused by the fact that the vehicle state cannot be monitored when the whole vehicle is powered off due to the fact that a mechanical structure is used for preventing the power shortage of the storage battery, and can also solve the problems that the storage battery cannot be started due to timing charging, the service life of the storage battery is damaged, and the electric quantity is wasted due to charging when the electric quantity.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control system for preventing the power shortage of a storage battery comprises an electric automobile and a mobile terminal; the electric automobile is integrated with a vehicle controller, a battery management system, a direct current-direct current converter, a storage battery, an intelligent storage battery sensor and a vehicle-mounted T-BOX;
the vehicle control unit is used for calculating the allowable standing time of the vehicle, monitoring the charging time, timing the standing time, waking up other functional modules of the vehicle after the timing is reached and monitoring the state of the vehicle;
the direct current-direct current converter is used for converting high-voltage electricity on the electric automobile into low-voltage electricity with the same voltage as the storage battery;
the intelligent storage battery sensor is used for acquiring storage battery voltage, current and temperature information and calculating the residual electric quantity of the storage battery; sending the information to the vehicle control unit through LIN;
the vehicle-mounted T-BOX is used for communicating with a mobile terminal;
the mobile terminal is integrated with an APP, and receives electric vehicle state information sent by the vehicle-mounted T-BOX based on the APP;
the vehicle control unit is in communication connection with a battery management system and a vehicle-mounted T-BOX, the battery management system is in communication connection with a direct current-direct current converter and an intelligent storage battery sensor, and the vehicle-mounted T-BOX is in communication connection with a mobile terminal through a wireless network.
A control method for preventing the power shortage of a storage battery comprises the following steps:
step 1, when the electric automobile is in a standing state, the intelligent storage battery sensor sends the collected storage battery residual electric quantity in the standing state and the whole automobile static current I1 to a whole automobile controller;
step 2, the vehicle controller calculates the allowable vehicle standing time T1 in real time according to the residual electric quantity of the storage battery during standing, the residual electric quantity of the discharge cut-off storage battery and the static current I1 of the whole vehicle;
step 3, after the vehicle is in a dormant state after being stopped, in order to prevent the storage battery from being lack of power, the vehicle controller guides the vehicle to exit the dormant state and sends a wake-up signal to wake up the battery management system and the vehicle-mounted T-BOX, and meanwhile, the vehicle controller starts safety limit and guides the vehicle to finish high-voltage power-on;
step 4, the vehicle controller calculates the vehicle quiescent current I2 collected by the intelligent storage battery sensor when the storage battery is charged after the vehicle is electrified at high voltage, compares the vehicle quiescent current I2 with the vehicle quiescent current I1, and enters step 5 if the deviation between the vehicle quiescent current I2 and the vehicle quiescent current I1 is greater than a threshold value; if the deviation between the static current I2 of the whole vehicle and the static current I1 of the whole vehicle is not larger than the threshold value, entering the step 6;
step 5, correcting the whole vehicle static current I3, and entering step 6 after correction;
step 6, the vehicle controller calculates the allowable vehicle standing time T2 in real time according to the current residual capacity of the storage battery, the residual capacity of the discharge cut-off storage battery and the static current I3 of the whole vehicle; the deviation between the finished automobile quiescent current I2 and the finished automobile quiescent current I1 is not greater than a threshold value, and the value of the finished automobile quiescent current I2 is taken as the corrected finished automobile quiescent current I3;
step 7, the vehicle control unit controls the direct current-direct current converter to start charging the storage battery;
and 8, acquiring and transmitting the state of the storage battery in real time by the intelligent storage battery sensor, and finishing the charging after the vehicle controller receives the full charge information of the storage battery.
In the step 2, the method for the vehicle controller to calculate the vehicle allowable standing time T1 in real time according to the remaining capacity of the storage battery during standing, the remaining capacity of the discharge cut-off storage battery and the vehicle quiescent current I1 includes:
t1 = battery capacity (battery remaining capacity-battery remaining capacity at rest)/vehicle quiescent current I1 × 1000;
the unit of the capacity of the storage battery is AH, and the unit of the quiescent current of the whole vehicle is mA.
In step 3, after the vehicle is in a dormant state after being stopped, in order to prevent the power shortage of the storage battery, the vehicle controller guides the vehicle to exit the dormant state and sends out a wake-up signal, and the vehicle is guided to complete the high-voltage power-on in the following two ways:
the first method is as follows: after the vehicle is powered off, the vehicle controller counts time according to the allowed standing time T1 calculated in the step 2, and after the time T1 is counted, the vehicle controller quits the sleep mode and sends out a wake-up signal to wake up the battery management system, the DC-DC converter and the vehicle-mounted T _ BOX; after awakening, the vehicle controller guides the vehicle to finish high-voltage power-on;
the second method comprises the following steps: after the vehicle is powered off, a user starts a storage battery charging function through the mobile terminal, and after the vehicle-mounted T-BOX receives information sent by the mobile terminal, the vehicle-mounted T-BOX quits from dormancy and sends a wake-up signal to wake up components such as a battery management system, a direct current-direct current converter, a vehicle control unit and the like; and after awakening, the vehicle controller guides the vehicle to finish high-voltage power-on.
The safety limit of the vehicle control unit in the step 3 is as follows:
A. when the vehicle controller detects that a high-voltage fault and an insulation fault occur in the vehicle, the vehicle controller controls the high-voltage battery and the battery management system to be powered on at a low voltage or immediately finishes the high-voltage power on, and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
B. when the vehicle controller detects that the front hatch cover of the vehicle is opened, the vehicle controller controls the high-voltage battery and the battery management system not to be powered on at high voltage or immediately finishes the high-voltage power on, and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
C. when the vehicle control unit detects that the electric quantity of the high-voltage battery is lower than a threshold value, the vehicle control unit controls the high-voltage battery and the battery management system not to be powered on at high voltage or immediately ends the high-voltage power on, and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
D. when the vehicle control unit detects that the charging time of the storage battery reaches 1 hour, the vehicle control unit controls the high-voltage battery and the battery management system to immediately finish high-voltage electrification and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
E. when the user selects to finish charging through the APP, the vehicle control unit controls the high-voltage battery and the battery management system to finish high-voltage electrification, and informs the user through the vehicle-mounted T _ BOX and the mobile terminal.
In the step 5, the method for correcting the entire vehicle current comprises the following steps:
and carrying out weighted average processing on the static current I1 of the whole vehicle and the static current I2 of the whole vehicle calculated by the whole vehicle controller to obtain the corrected static current of the whole vehicle.
The invention has the beneficial effects that:
the control system and the control method for preventing the power shortage of the storage battery utilize a vehicle control unit, a battery management system, a direct current-direct current converter, the storage battery, an intelligent storage battery sensor, a vehicle-mounted T-BOX and a mobile terminal, and can monitor the residual electric quantity of the storage battery of the electric vehicle and the quiescent current of the vehicle in real time so as to calculate the allowable standing time of the vehicle; when the electric quantity of the storage battery is not saturated, the vehicle control unit can automatically time, automatically charge the storage battery according to the allowable static time of the vehicle, and a user can manually control the storage battery to charge through the mobile terminal according to the requirement; before or during the charging process of the storage battery, the vehicle control unit monitors the state of the electric vehicle in real time, and when the charging of the electric vehicle is limited, the vehicle control unit can control the high-voltage battery not to be powered or immediately finish the power-on, so that potential safety hazards are prevented; finally, in the charging process of the storage battery, the vehicle control unit can also correct the quiescent current of the whole vehicle in real time, and can calculate the allowable standing time of the vehicle in real time according to the corrected quiescent current of the whole vehicle, so that the situation of insufficient electric quantity of the storage battery caused by long-time dormancy of the electric vehicle after the charging of the storage battery is finished is prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the method of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the control system for preventing the power shortage of the storage battery according to the present invention includes an electric vehicle and a mobile terminal; the electric automobile is integrated with a vehicle control unit, a battery management system, a direct current-direct current converter, a storage battery, an intelligent storage battery sensor and a vehicle-mounted T-BOX.
The vehicle controller is a core electronic control unit for realizing vehicle control decision, and is generally only equipped for electric vehicles, and the conventional fuel vehicle does not need the device. The vehicle control unit judges the driving intention of a driver by acquiring signals of an accelerator pedal, a gear, a brake pedal and the like; the vehicle control system comprises a vehicle control unit, a vehicle-mounted function module, a vehicle-mounted power system, a high-voltage battery system, a vehicle-mounted power system, a; the vehicle control unit has the functions of vehicle system fault diagnosis protection and storage. The vehicle controller is mainly used for calculating the allowable standing time of the vehicle, monitoring the charging time, timing the standing time, waking up other functional modules of the vehicle after the timing is reached and monitoring the state of the vehicle.
The direct current-direct current converter is used for converting high-voltage electricity on the electric automobile into low-voltage electricity with the same voltage as the storage battery; at present, a high-voltage battery and a low-voltage battery are integrated on an electric automobile, and the high-voltage battery is mainly used for driving the electric automobile to run and charging the battery under the control of a vehicle control unit.
The intelligent storage battery sensor is used for acquiring storage battery voltage, current and temperature information and calculating the residual electric quantity of the storage battery; and transmits the information to the vehicle control unit through LIN.
The vehicle-mounted T-BOX is used for communicating with a mobile terminal.
The mobile terminal is integrated with an APP, and receives electric vehicle state information sent by the vehicle-mounted T-BOX based on the APP; the mobile terminal can adopt portable intelligent electronic equipment such as a mobile phone and a tablet personal computer.
The vehicle control unit is in communication connection with a battery management system and a vehicle-mounted T-BOX, the battery management system is in communication connection with a direct current-direct current converter and an intelligent storage battery sensor, and the vehicle-mounted T-BOX is in communication connection with a mobile terminal through a wireless network.
As shown in fig. 2, a control method for preventing the power shortage of the storage battery based on the control system for preventing the power shortage of the storage battery comprises the following steps:
step 1, when the electric automobile is in a standing state, the intelligent storage battery sensor sends the collected storage battery residual electric quantity in the standing state and the whole automobile static current I1 to a whole automobile controller;
step 2, the vehicle controller calculates the allowable vehicle standing time T1 in real time according to the residual electric quantity of the storage battery during standing, the residual electric quantity of the discharge cut-off storage battery and the static current I1 of the whole vehicle;
the method for calculating the allowable resting time T1 of the vehicle comprises the following steps:
t1 = battery capacity (current battery remaining capacity-end battery remaining capacity)/vehicle quiescent current I1 × 1000; the unit of the capacity of the storage battery is AH, and the unit of the static current I1 of the whole vehicle is mA;
step 3, after the vehicle is in a dormant state after being stopped, in order to prevent the storage battery from being lack of power, the vehicle controller guides the vehicle to exit the dormant state and sends a wake-up signal to wake up the battery management system and the vehicle-mounted T-BOX, and meanwhile, the vehicle controller starts safety limit and guides the vehicle to finish high-voltage power-on;
the vehicle controller guides the vehicle to complete high-voltage power-on in the following two ways:
the first method is as follows: after the vehicle is powered off, the vehicle controller counts time according to the allowed standing time T1 calculated in the step 2, and after the time T1 is counted, the vehicle controller quits the sleep mode and sends out a wake-up signal to wake up the battery management system, the DC-DC converter and the vehicle-mounted T _ BOX; after awakening, the vehicle controller guides the vehicle to finish high-voltage power-on;
the second method comprises the following steps: after the vehicle is powered off, a user starts a storage battery charging function through the APP on the mobile terminal, and after the vehicle-mounted T-BOX receives information sent by the APP on the mobile terminal, the vehicle-mounted T-BOX quits from dormancy and sends a wake-up signal to wake up components such as a battery management system, a direct current-direct current converter, a vehicle controller and the like; and after awakening, the vehicle controller guides the vehicle to finish high-voltage power-on.
The safety limit of the vehicle control unit is as follows:
A. when the vehicle controller detects that a vehicle has a high-voltage fault and an insulation fault, the vehicle controller controls the high-voltage battery and the battery management system to be powered on at a low voltage or immediately finishes the high-voltage power on, and informs a user through the vehicle-mounted T-BOX and the mobile terminal;
B. when the vehicle controller detects that the front hatch cover of the vehicle is opened, the vehicle controller controls the high-voltage battery and the battery management system not to be powered on at high voltage or immediately finishes the high-voltage power on, and informs a user through the vehicle-mounted T-BOX and the mobile terminal;
C. when the vehicle control unit detects that the electric quantity of the high-voltage battery is lower than a threshold value, the vehicle control unit controls the high-voltage battery and the battery management system not to be powered on at high voltage or immediately ends the high-voltage power on, and informs a user through the vehicle-mounted T-BOX and the mobile terminal;
D. when the vehicle control unit detects that the charging time of the storage battery reaches 1 hour, the vehicle control unit controls the high-voltage battery and the battery management system to immediately finish high-voltage electrification and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
E. when the user selects to finish charging through the APP, the high-voltage battery and the battery management system are controlled to immediately finish power-on, and the user is informed through the vehicle-mounted T-BOX and the mobile terminal;
step 4, the vehicle controller calculates the vehicle quiescent current I2 collected by the intelligent storage battery sensor when the storage battery is charged after the vehicle is electrified at high voltage, compares the vehicle quiescent current I2 with the vehicle quiescent current I1, and enters step 5 if the deviation between the vehicle quiescent current I2 and the vehicle quiescent current I1 is greater than a threshold value; if the deviation between the static current I2 of the whole vehicle and the static current I1 of the whole vehicle is not larger than the threshold value, entering the step 6;
the method for calculating the static current I2 of the whole vehicle comprises the following steps:
the static current of the whole vehicle I2= battery capacity (remaining battery capacity-current remaining battery capacity at rest)/allowable rest time T1 × 1000;
step 5, correcting the whole vehicle static current I3, and entering step 6 after correction;
the method for correcting the static current I3 of the whole vehicle comprises the following steps: carrying out weighted average processing on the static current I2 of the whole vehicle and the static current I1 of the whole vehicle to obtain the corrected static current I3 of the whole vehicle;
step 6, the vehicle controller calculates the allowable vehicle standing time T2 in real time according to the current residual capacity of the storage battery, the residual capacity of the discharge cut-off storage battery and the static current I3 of the whole vehicle; the deviation between the finished automobile quiescent current I2 and the finished automobile quiescent current I1 is not greater than a threshold value, and the value of the finished automobile quiescent current I2 is taken as the corrected finished automobile quiescent current I3; the situation that the electric quantity of the storage battery is insufficient due to long-time dormancy of the electric automobile after the storage battery is charged is prevented;
the method for calculating the allowable resting time T2 of the vehicle comprises the following steps:
t2 = battery capacity (current battery remaining capacity-end battery remaining capacity)/vehicle quiescent current I3 × 1000; the unit of the capacity of the storage battery is AH, and the unit of the static current I3 of the whole vehicle is mA;
step 7, the vehicle control unit controls the direct current-direct current converter to start charging the storage battery;
and 8, acquiring and transmitting the state of the storage battery in real time by the intelligent storage battery sensor, and finishing the charging after the vehicle controller receives the full charge information of the storage battery.
The invention has the beneficial effects that:
the control system and the control method for preventing the power shortage of the storage battery utilize a vehicle control unit, a battery management system, a direct current-direct current converter, the storage battery, an intelligent storage battery sensor, a vehicle-mounted T-BOX and a mobile terminal, and can monitor the residual electric quantity of the storage battery of the electric vehicle and the quiescent current of the vehicle in real time so as to calculate the allowable standing time of the vehicle; when the electric quantity of the storage battery is not saturated, the vehicle control unit can automatically time, automatically charge the storage battery according to the allowable static time of the vehicle, and a user can manually control the storage battery to charge through the mobile terminal according to the requirement; before or during the charging process of the storage battery, the vehicle control unit monitors the state of the electric vehicle in real time, and when the charging of the electric vehicle is limited, the vehicle control unit can control the high-voltage battery not to be powered or immediately finish the power-on, so that potential safety hazards are prevented; finally, in the charging process of the storage battery, the vehicle control unit can also correct the quiescent current of the whole vehicle in real time, and can calculate the allowable standing time of the vehicle in real time according to the corrected quiescent current of the whole vehicle, so that the situation of insufficient electric quantity of the storage battery caused by long-time dormancy of the electric vehicle after the charging of the storage battery is finished is prevented.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A control method for preventing the power shortage of a storage battery is realized by utilizing a control system for preventing the power shortage of the storage battery, wherein the control system for preventing the power shortage of the storage battery comprises an electric automobile and a mobile terminal; the electric automobile is integrated with a vehicle controller, a battery management system, a direct current-direct current converter, a storage battery, an intelligent storage battery sensor and a vehicle-mounted T-BOX; the vehicle-mounted T-BOX is used for communicating with a mobile terminal; the mobile terminal is integrated with an APP, and receives electric vehicle state information sent by the vehicle-mounted T-BOX based on the APP; the vehicle control unit is in communication connection with a battery management system and a vehicle-mounted T-BOX, the battery management system is in communication connection with a direct current-direct current converter and an intelligent storage battery sensor, and the vehicle-mounted T-BOX is in communication connection with a mobile terminal through a wireless network; the method is characterized by comprising the following steps:
step 1, when the electric automobile is in a standing state, the intelligent storage battery sensor sends the collected storage battery residual electric quantity in the standing state and the whole automobile static current I1 to a whole automobile controller;
step 2, the vehicle controller calculates the allowable vehicle standing time T1 in real time according to the residual electric quantity of the storage battery during standing, the residual electric quantity of the discharge cut-off storage battery and the static current I1 of the whole vehicle;
step 3, after the vehicle is in a dormant state after being stopped, in order to prevent the storage battery from being lack of power, the vehicle controller guides the vehicle to exit the dormant state and sends a wake-up signal to wake up the battery management system and the vehicle-mounted T-BOX, and meanwhile, the vehicle controller starts safety limit and guides the vehicle to finish high-voltage power-on;
step 4, the vehicle controller calculates the vehicle quiescent current I2 collected by the intelligent storage battery sensor when the storage battery is charged after the vehicle is electrified at high voltage, compares the vehicle quiescent current I2 with the vehicle quiescent current I1, and enters step 5 if the deviation between the vehicle quiescent current I2 and the vehicle quiescent current I1 is greater than a threshold value; if the deviation between the static current I2 of the whole vehicle and the static current I1 of the whole vehicle is not larger than the threshold value, entering the step 6;
step 5, carrying out weighted average processing on the static current I1 of the whole vehicle and the static current I2 of the whole vehicle calculated by the whole vehicle controller to obtain the static current I3 of the whole vehicle after correction, and entering step 6 after correction;
step 6, the vehicle controller calculates the allowable vehicle standing time T2 in real time according to the current residual capacity of the storage battery, the residual capacity of the discharge cut-off storage battery and the static current I3 of the whole vehicle; the deviation between the finished automobile quiescent current I2 and the finished automobile quiescent current I1 is not greater than a threshold value, and the value of the finished automobile quiescent current I2 is taken as the corrected finished automobile quiescent current I3;
step 7, the vehicle control unit controls the direct current-direct current converter to start charging the storage battery;
and 8, acquiring and transmitting the state of the storage battery in real time by the intelligent storage battery sensor, and finishing the charging after the vehicle controller receives the full charge information of the storage battery.
2. The control method for preventing the power shortage of the storage battery according to claim 1, wherein: in the step 2, the method for the vehicle controller to calculate the vehicle allowable standing time T1 in real time according to the remaining capacity of the storage battery during standing, the remaining capacity of the discharge cut-off storage battery and the vehicle quiescent current I1 includes:
t1 = battery capacity (battery remaining capacity-battery remaining capacity at rest)/vehicle quiescent current I1 × 1000;
the unit of the capacity of the storage battery is AH, and the unit of the quiescent current of the whole vehicle is mA.
3. The control method for preventing the power shortage of the storage battery according to claim 1, wherein: in step 3, after the vehicle is in a dormant state after being stopped, in order to prevent the power shortage of the storage battery, the vehicle controller guides the vehicle to exit the dormant state and sends out a wake-up signal, and the vehicle is guided to complete the high-voltage power-on in the following two ways:
the first method is as follows: after the vehicle is powered off, the vehicle controller counts time according to the allowed standing time T1 calculated in the step 2, and after the time T1 is counted, the vehicle controller quits the sleep mode and sends out a wake-up signal to wake up the battery management system, the DC-DC converter and the vehicle-mounted T _ BOX; after awakening, the vehicle controller guides the vehicle to finish high-voltage power-on;
the second method comprises the following steps: after the vehicle is powered off, a user starts a storage battery charging function through the mobile terminal, and after the vehicle-mounted T-BOX receives information sent by the mobile terminal, the vehicle-mounted T-BOX quits from dormancy and sends a wake-up signal to wake up components such as a battery management system, a direct current-direct current converter, a vehicle control unit and the like; and after awakening, the vehicle controller guides the vehicle to finish high-voltage power-on.
4. The control method for preventing the power shortage of the storage battery according to claim 1, wherein: the safety limit of the vehicle control unit in the step 3 is as follows:
A. when the vehicle controller detects that a high-voltage fault and an insulation fault occur in the vehicle, the vehicle controller controls the high-voltage battery and the battery management system to be powered on at a low voltage or immediately finishes the high-voltage power on, and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
B. when the vehicle controller detects that the front hatch cover of the vehicle is opened, the vehicle controller controls the high-voltage battery and the battery management system not to be powered on at high voltage or immediately finishes the high-voltage power on, and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
C. when the vehicle control unit detects that the electric quantity of the high-voltage battery is lower than a threshold value, the vehicle control unit controls the high-voltage battery and the battery management system not to be powered on at high voltage or immediately ends the high-voltage power on, and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
D. when the vehicle control unit detects that the charging time of the storage battery reaches 1 hour, the vehicle control unit controls the high-voltage battery and the battery management system to immediately finish high-voltage electrification and informs a user through the vehicle-mounted T _ BOX and the mobile terminal;
E. when the user selects to finish charging through the APP, the vehicle control unit controls the high-voltage battery and the battery management system to finish high-voltage electrification, and informs the user through the vehicle-mounted T _ BOX and the mobile terminal.
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